Attachment for vacuum cleaners



April 19.29. 1 A. A. ERvA 1,708,282

ATTACHMENT FOR VACUUM CLEANEES Filed May 22, 1924 4 Sheets-Sheet 1 A. A. SERVA April 9, 1929.

ATTACHMENT FOR VACUUM CLEANERS Filed May 22, 1924 4 Sheets-Sheet 2 7 a? I 1V M l -3nucnl'oz A.A. 5611M.

April 9, 1929. A, A, SERVA 1,708,282

- ATTACHMENT FOR VACUUM CLEANERS Filed May 22, 1924 4 Shets-Sheet;

mmnm) W w M man-0H April 9, 1929. A. -A. SERVA 1,708,282

ATTACHMENT FOR VACUUM-CLEANERS Filed May 22, 1924 4 Sheets-Sheet 4 cleaner, without making any changes therein.

Patented Apr. 9, 1929.

UNITED STATES PATE ADAM A. SERVA, 0F CANTON, OHIO, ASSIGNOR To THE UNITED ELECTRIC COMPANY,

NT' OFFICE.

0F CANTON,- OHIO, A CORPORATION OF OHIO.

' ATTACHMENT FOR VACUUM CLEANERS.

Application filed May 22,

Theinvention relates to a hose attachment for a portable vacuum cleaner, and the object of the improvement is to provide an attachment which can be applied to the ordinary This object is attained by providing a hose connection with a shoe arranged to be inserted through the mouth and wedged into the throat of the nozzle of the vacuum cleaner, with means for forcing and clamping the shoe into position.

r The improvement also involves the use of a castor on each side of the attachment, so that when the attachment is placed in position, the vacuum cleaner willrest and may ride upon the attachment castors and the castor ordinarily provided on the rear end of the machine. i 7,

The invention is illustrated in the accompanying drawings, forming part hereof, in which- Figure 1 is a fragmentary, side elevation of a portable vacuum cleaner, showin the nozzle in section with the attachment shown in lace therein;

ig. 2, an underside plan view of the same; Fig. 3, an underside, perspective view of the vacuum cleaner without the attachment,

lmgiing into the mouth of the nozzle thereof; an

Fig. 4, a detached, perspective view of the hlpse attachment, looking at the end of the s 09.

Similar numerals refer throughout the drawings.

The portable vacuum .cleaner may be. of any ordinary type including a case 5 form- .ing a fan cham er 6, upon which is mounted a motor 7 and a nozzle case 8 extending downward and forward from the fan case, forming "a suction chamber 9 with an elongated mouth 10.on its lower side extending across the front of the machine, and a neck 11 extending rearward under the fan chamber from the suction chamber to the inlet opening 12 of the fan chamber.

The forward wall 13 and the lip 13' thereof extend entirelyacross the front of the machine, but the rear wall 14 of the suction chamber merges at each side with the side walls 15 of the neck'of the nozzle to form the-throat 16 of the neck between the bottom wall 17 of the fan chamber and the bottom wall 18 of the neck of the nozzle.

, The side walls of the neck converge toto similar parts wire lacing 22 or the like,

1924. Serial No. 715,112.

ward each other from front to rear and the bottom wall of the neck converges slightly toward the bottom Wall of the fan casing; thus forming the throat 16 of the nozzle with allits walls converging from front to rear.

The hose attachment is in the form of a casing having a forwardly extending, tubular stem 19, to which a'hose may be attached, and a rearwardly extending shoe 21 in the form of a flattened tubular goose neck curved first upward and then rearward, and having its rear'end shaped to fit into the throat of the nozzle and tapered on all its sides to wedge between the tapered walls thereof.

A resilient packing ring 22 is secured upon and around the rear end 21 of the shoe," to which it may be cemented or fastened by a and this packing ring serves to seal the-connection between the rear end of the shoe and the throat of the nozzle when the shoe is inserted and clamped therein, as shown in Figs. 1 and 2. The upper wall 21" of the shoe is curved to form a cam guide acting against the forward lip of-the nozzle, and when the rear end of the shoe is inserted through the mouth of the nozzle into the. throat thereof, this cam guide serves to force and wedge the end of the shoe into the throat by raising the for- Y ward end of the attachment upward.

Upon the forward end of the stem of the hose attachment is formed a bracket 23 in which is mounted a clamping dog 24 upon 'a transverse pivot 25, carrying a spring 26 which normallyurges the dog upward; and in the same bracket is mounted a clamping screw 27 arranged to operate against the upper side ofthe dog to force it downward.

When the clamping screw 27 is turned outward, the clamping dog is normally held upward by action of the spring 26, as shown by broken lines in Fig. 1, so that the goose neck shoe may be readily entered through the Y mouth of the nozzle into the neck thereof;

given the cross sectional shape .and'the'endwise taper corresponding to the neck of the nozzle for thepar'ticular machine for which it .'is intended, so as to seal-the joint by a Wedgin-g action when forced and clamped therein.

. .Forthe purpo'se'of supporting the nozzle ortion of the cleaner in raised position, so tat the same may ride upon the floor when the hose attachment-is in place, castors 30 be provided upon the attachment.

with an'outwardly extending, tubular boss 32 terminating in the reduced journal portion 33, upon which the castor 30 may be journaled.

A shaft 34 extends through the bosses 32 and'is provided at-each end with a washer 35 held against the end of the adjacent journal portion,,as by a cotter pin 36. The journal portions 33 are of sufiicient length to permit the castors to rotate freely .thereon, while depending ear 31 may be formed upon each side of the attachment and providedthe shoulder 37 and washer 35 limit lateral movement of each castor upon its journal.

' I claim 1. A vacuum cleaner including a case forming a fan chamber and a nozzle with a suction chamber having a mouth, and a neck leading from the suction chamber to the fan chamber, and a hose attachment including a tubular shoe having a tapered end insertable through the mouth for wedging into ;the entrance end of said neck.

2. A vacuum cleaner including a case forming a fan chamber and a nozzle with a suction chamber having a mouth, and a neck leading from the suction chamber to the fan 

